Are we looking for artistic or practical answers?
The “new scope” defines a lifehack as
a technique that can be implemented quickly and is used to make one's physical life more efficient when a more standard approach
This implies that we are looking for practical answers. Therefore, what matters about an answer is whether it works and whether it is convenient. The following are valid reasons to downvote:
- It requires expensive materials or devices.
- It requires objects that one would not ordinarily have at hand.
- It requires a lot of time to carry out.
But “it isn't creative enough” is not a valid reason to downvote. If the best way to solve a problem is the obvious way, so be it.
Excluding the obvious way would be a recipe for mediocrity. Sometimes the best way to skin a cat is a cat-skinner¹. We should encourage voting for good ways to solve the problem, without arbitrarily excluding ways for being too square. Otherwise, this site would turn into a collection of second-best answers only.
This goes in line with encouraging (while not requiring) questions to specify what was tried. If the “obvious” solution is unsuitable, the question should mention why. If that's not the case, then maybe the obvious solution isn't so obvious, or maybe there just is no other reasonable way to solve this problem, and either way, the obvious answer is a perfectly valid answer.
Keep in mind that the vast majority of people who'll read Lifehacks.SE threads are not participants — they're visitors who found the site in a web search. These people don't care about the site name. They aren't looking for “lifehacks” — they're looking for a solution to their problem. If the question describes a problem which has a “conventional” answer, it's vital that this answer be given as much consideration as “unconventional” answers: otherwise we would be polluting search results with irrelevant answers, and thus making the Internet a worse place.
¹ Note to cat lovers lacking a sense of humor: this example is obviously fictional.